Flora of North America species comparison

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Ivesia rhypara var. shellyi

Rosaceae subfam. rosoideae
Photo is of parent taxon

Shelly's ivesia, Shelly's mousetail
Habit Plants 2–10(–15) cm diam. Herbs, shrubs, or subshrubs.
Stems

(0.1–)0.2–0.5(–0.9) dm, equal to or exceeding leaves by no more than 2(–7) cm.

Leaves

alternate, rarely opposite, pinnately compound, sometimes simple or palmately compound;

stipules present, rarely absent.
Inflorescences

5–30(–60)-flowered, 0.5–2(–5) cm diam. 2n = 28.

Flowers

torus usually enlarged, sometimes small or absent;

carpels 1–260(–450), distinct, free, styles distinct, rarely connate (Roseae);

ovules 1(or 2), collateral (Rubeae) or superposed (Fallugia, Filipendula).
Fruits

achenes or aggregated achenes sometimes with fleshy, urn-shaped hypanthium or enlarged torus, sometimes aggregated drupelets;

styles persistent or deciduous, not elongate (elongate but not plumose in Geum).
x

= 7(8).

Ivesia rhypara var. shellyi

Rosaceae subfam. rosoideae
Phenology Flowering summer.
Habitat Overtly petrophytic in cracks and crevices of pumiceous welded ash-flow tuff boulders and outcrops, in sagebrush communities
Elevation 1300–1600 m (4300–5200 ft)
Distribution
from FNA
OR
[BONAP county map]
North America; Mexico; Central America; South America; West Indies; Bermuda; Eurasia; Africa; Atlantic Islands; Indian Ocean Islands; Pacific Islands; Australia
Discussion

Of conservation concern.

In addition to their more overtly petrophytic habit, plants of var. shellyi are generally smaller and more compact than those of var. rhypara. It is known only from the Rehart and Venator canyons area along the border of Harney and Lake counties in southeastern Oregon.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Variation in the number of genera in subfam. Rosoideae is due to differences in generic delimitation between D. Potter et al. (2007) and the authors of some Potentilleae genera. Cyanogenic glycosides and sorbitol are absent in the subfamily.

Tribes 6, genera 28–35, species ca. 1600 (6 tribes, 26 genera, 302 species, including 1 hybrid, in the flora)

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 229. FNA vol. 9, p. 23. Author: Luc Brouillet.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Ivesia > sect. Setosae > Ivesia rhypara Rosaceae
Sibling taxa
I. rhypara var. rhypara
Subordinate taxa
Name authority Ertter: Syst. Bot. 14: 239, fig. 4. (1989) Arnott: Botany, 107. (1832)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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